[ruby/mmtk] Fix clippy warnings and formatting.
We also enable #![warn(unsafe_op_in_unsafe_fn)] in the whole mmtk_ruby crate.
#![warn(unsafe_op_in_unsafe_fn)]
https://github.com/ruby/mmtk/commit/8b8025f71a
Added by
[ruby/mmtk] Fix clippy warnings and formatting.
We also enable
#![warn(unsafe_op_in_unsafe_fn)]in the whole mmtk_rubycrate.
https://github.com/ruby/mmtk/commit/8b8025f71a